package com.zhang.cloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;
@Service
public class HystrixService {

    public String paymentInfo_ok(Integer id){
        return "线程池："+Thread.currentThread().getName()+"paymentInfo_ok,id:"+id;
    }

    //类似于说，兄弟我出事情了，你保留一个方法帮我兜底
//    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
//            //这里规定3s以内就是正常的业务逻辑
//            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value="2000")
//    })
    public String paymentInfo_TimeOut(Integer id){
        int a = 10/0;
        try { TimeUnit.MILLISECONDS.sleep(3000); } catch (InterruptedException e) { e.printStackTrace();
        }
        return "线程池："+Thread.currentThread().getName()+"paymentInfo_TimeOut,id:"+id+" 耗时3秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池："+Thread.currentThread().getName()+"paymentInfo_TimeOut,"+"8001请求正忙，请稍等~";
    }









    //服务熔断

    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),  //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),   //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),  //时间范围，时间窗口区，10s后进入半开状态，试探性接受请求
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"), //失败率达到多少后跳闸
    })//上面这些属性，都是HystrixProperty的变量，配置以更改默认值
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id < 0){
            throw new RuntimeException("*****id 不能负数");//出事了
        }
        String serialNumber = IdUtil.simpleUUID();//等价于UUID.randomUUID().toString();    hutool工具包里的，在commons的pom文件中

        return Thread.currentThread().getName()+"\t"+"调用成功,流水号："+serialNumber;
    }




    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能负数，请稍候再试,(┬＿┬)/~~     id: " +id;
    }

}
